Stuart Brown

Self (Play Researcher)

Mariana Brussoni

Self (Developmental Psychologist)

Gordon Burghardt

Self (Reptile Researcher)

Matthew Cooper

Self (Neuroscientist)

Geoff D'Eon

Narrator (voice)

Ellen Beate Hansen Sandseter

Self (Child Psychologist)

Kathy Hirsh-Pasek

Self (Developmental Psychologist)

Kathryn Kegel

Self (Seattle Aquarium)

Elisabetta Palagi

Self (Primate Researcher)

Sergio Pellis

Self (Neuroscientist)